Set screensaver timer via Terminal

running El Capitan, latest version

Hello,

To manage remote machines, I'd like to set the screensaver timer to 0 via CLI. I've seen many posts suggesting modifying the com.apple.screensaver.plist entry called "idleTime" but AFAIK, there's no such key in that plist : only infos on the current screensaver, and a "type" key, as you can see here.

I've tried adding this key, but it didn't work.

How can I achieve that ?

Thanks,

AS